Adams, N.J., Crawford, R.J.M., Dyer, B.M., Laugksch, R.C. Diet of the African Penguin Spheniscus demersus at Dyer Island, South Africa
1982-1996. Marine Ornithology.
Crawford, R.J.M., Shannon, L.J., Whittington, P.A. & Murison, G. submitted. Factors influencing growth of the African Penguin colony at Boulders, South Africa, 1985-1999. South African Journal of Marine Science.
Crawford, R.J.M., Williams, A.J., Hofmeyr, J.H., Klages, N.T.W., Randall, R.M., Cooper, J., Dyer, B.M. and Chesselet, Y. 1995a. Trends of African Penguin Spheniscus demersus populations in the 20th century. South African Journal of Marine Science 16: 101-118.
Crawford, R.J.M., Dyer, B.M. and Brown, P.C. 1995b. Absence of breeding by African Penguins at four former colonies. South African Journal of Marine Science 15: 269-272.
Crawford, R.J.M., Shannon, L.J. and Whittington, P.A. 1999. Population dynamics of the African Penguin Spheniscus demersus at Robben Island.Marine Ornithology 27: 139-147.
Cordes, I., Crawford, R.J.M., Williams, A.J., Dyer, B.M. 1999. Decrease of African Penguins at the Possession Island group, 1956–1995: contrasting trends for colonial and solitary breeders. Marine Ornithology 27: 129–138.
David, J. H. M., Cury, P., Crawford, R.J.M., Randall, R. M., L.G. Underhill, M.A. Meyer, M. A.. 2003. Assessing conservation priorities in the Benguela ecosystem, South Africa: analysing predation by seals on threatened seabirds. Biological Conservation 114: 289–292.
Ellis, S., Croxal, J.P., Cooper, J. 1996. PENGUIN Conservation Assessment and Management Plan (PENGUIN CAMP). Avian Demography Unit. Department of Statistical Sciencies. University of Cape Town.
Kemper, J. et al. Breesing patterns and factors influencing breeding success of African Penguins Spheniscus demersus in Namibia. Top Predators of the Benguela System. 89-99.
Randall, R.M., Randall, B.M., Cooper, J., La Cock, G.D. and Ross, G.J.B. 1987. Jackass Penguin Spheniscus demersus movements, inter-island visits and settlement. Journal of Field Ornithology 58: 445-455.
Randall, R.M., Randall, B.M. and Compagno, L.J.V. 1988. Injuries to Jackass Penguins (Spheniscus demersus): evidence for shark involvement. Journal of the Zoological Society of London. 214: 589-599.
Shanon, L.J. Crawford, R. J. M. 1999. Management of the African Penguin Spheniscus demersus – insights from modelling. Marine Ornithology 27: 119–128.
Villiers, M. 2002. Effect of a storm on breeding African Penguins Spheniscus demersus at Foxy Beach, Boulders Penguin Colony, Simon’s Town. Bird Numbers 11: 7-9.
Whittington, P., Crawford, R.J.M., Huyser, O., Oschadleus, D., Randall, R., Ryan, P., Shannon, L., Woolfardt, A., Cooper, J., Lacy, R. and S. Ellis (Eds.) 2000. African Penguin Population and Habitat Viability Assessment. Final Report. IUCN/SSC Conservation Breeding Specialist Group: Apple Valley, MN.
Wilkinson, C. P., Esmonde-White, D. A., Underhill, L. G., Whittington, P.A. 1999. African penguins Spheniscus demersus along the KwaZulu-Natal coast, 1981-1999. Marine Ornithology 27: 111-113.
Wolfaardt, A. C., Underhill, L. G., Crawford R. J. M., Klages, N. T. W. 2001. Results of the 2001 census of African penguins Spheniscus demersus in South Africa: first measures of the impact of the Treasure oil spill on the breeding population. Trans. Royal Society South Africa 56: 45-49.
Adams, N.J., Crawford, R.J.M., Dyer, B.M., Laugksch, R.C. Diet of the African Penguin Spheniscus demersus at Dyer Island, South Africa
1982-1996. Marine Ornithology.
Crawford, R.J.M., Shannon, L.J., Whittington, P.A. & Murison, G. submitted. Factors influencing growth of the African Penguin colony at Boulders, South Africa, 1985-1999. South African Journal of Marine Science.
Crawford, R.J.M., Williams, A.J., Hofmeyr, J.H., Klages, N.T.W., Randall, R.M., Cooper, J., Dyer, B.M. and Chesselet, Y. 1995a. Trends of African Penguin Spheniscus demersus populations in the 20th century. South African Journal of Marine Science 16: 101-118.
Crawford, R.J.M., Dyer, B.M. and Brown, P.C. 1995b. Absence of breeding by African Penguins at four former colonies. South African Journal of Marine Science 15: 269-272.
Crawford, R.J.M., Shannon, L.J. and Whittington, P.A. 1999. Population dynamics of the African Penguin Spheniscus demersus at Robben Island. Marine Ornithology 27: 139-147.
Cordes, I., Crawford, R.J.M., Williams, A.J., Dyer, B.M. 1999. Decrease of African Penguins at the Possession Island group, 1956–1995: contrasting trends for colonial and solitary breeders. Marine Ornithology 27: 129–138.
David, J. H. M., Cury, P., Crawford, R.J.M., Randall, R. M., L.G. Underhill, M.A. Meyer, M. A.. 2003. Assessing conservation priorities in the Benguela ecosystem, South Africa: analysing predation by seals on threatened seabirds. Biological Conservation 114: 289–292.
Ellis, S., Croxal, J.P., Cooper, J. 1996. PENGUIN Conservation Assessment and Management Plan (PENGUIN CAMP). Avian Demography Unit. Department of Statistical Sciencies. University of Cape Town.Kemper, J. et al. Breesing patterns and factors influencing breeding success of African Penguins Spheniscus demersus in Namibia. Top Predators of the Benguela System. 89-99.
Randall, R.M., Randall, B.M., Cooper, J., La Cock, G.D. and Ross, G.J.B. 1987. Jackass Penguin Spheniscus demersus movements, inter-island visits and settlement. Journal of Field Ornithology 58: 445-455.
Randall, R.M., Randall, B.M. and Compagno, L.J.V. 1988. Injuries to Jackass Penguins (Spheniscus demersus): evidence for shark involvement. Journal of the Zoological Society of London. 214: 589-599.
Shanon, L.J. Crawford, R. J. M. 1999. Management of the African Penguin Spheniscus demersus – insights from modelling. Marine Ornithology 27: 119–128.
Villiers, M. 2002. Effect of a storm on breeding African Penguins Spheniscus demersus at Foxy Beach, Boulders Penguin Colony, Simon’s Town. Bird Numbers 11: 7-9.
Whittington, P., Crawford, R.J.M., Huyser, O., Oschadleus, D., Randall, R., Ryan, P., Shannon, L., Woolfardt, A., Cooper, J., Lacy, R. and S. Ellis (Eds.) 2000. African Penguin Population and Habitat Viability Assessment. Final Report. IUCN/SSC Conservation Breeding Specialist Group: Apple Valley, MN.
Wilkinson, C. P., Esmonde-White, D. A., Underhill, L. G., Whittington, P.A. 1999. African penguins Spheniscus demersus along the KwaZulu-Natal coast, 1981-1999. Marine Ornithology 27: 111-113.
Wolfaardt, A. C., Underhill, L. G., Crawford R. J. M., Klages, N. T. W. 2001. Results of the 2001 census of African penguins Spheniscus demersus in South Africa: first measures of the impact of the Treasure oil spill on the breeding population. Trans. Royal Society South Africa 56: 45-49.